ugh, fellas, this story is an unfortunate turn-off for me. right off the bat, using your pointer finger to finger someone? middle works best, then add your ring finger, THEN pointer finger if your partner still wants more (this is just from my experiences, talk to your partner and ask if what you're doing feels good). she's not even using her palm for pete's sake! that's basic lesbian 101.
i do admit that the communication aspect of this surprised me- only for me to change my mind when she suddenly used a ball gag. if you're gonna cut off someone's ability to vocally stop sex, then you gotta have a visual signal, especially if you not only have them blindfolded, but tied up as well. just think about how vulnerable that makes your partner. jumping from vanilla right into some serious bdsm, even with consent, is just- i don't know- super unrealistic to me. but what do i know, it's a manga.